Update estimate ticket subject prefix from colon to dash

Change the linked ticket subject format from "Estimate: <subject>" to
"Estimate - <subject>" per Winter's request for consistent formatting.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/commands/syncro.md

@@ -606,7 +606,7 @@ TICKET_RESP=$(curl -s -X POST "${BASE}/tickets?api_key=${API_KEY}" \
   --data-binary @- <<JSON
 {
   "customer_id": ${CUST_ID},
-  "subject": "Estimate: <subject>",
+  "subject": "Estimate - <subject>",
   "status": "New",
   "problem_type": "Estimate"
 }